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《Science of Surveying and Mapping》 2008-S3
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Application of modified grey model in insertion of interrupted data of subsidence monitor

ZHANG Ai-zhong①,ZHANG Jian-xiong②(①Survey and Design Institute of ZIXING Coal Grou Pin HUNAN Province,Zixing 423404,China;②School of Surveying and Land Information Engineering,Henan Polytechnic University,Jiaozuo 454003,China)  
With regard to large and towering buildings,regular subsidence monitoring is an essential and very important work to ensure the safety of the building during construction and running. However,restricted by various conditions,sometimes subsidence monitor can be interrupted. In order to analyze the law of the subsidence of the building,it is necessary to insert and replenish the interrupted data. Firstly,the unequal interval characteristic of subsidence monitor of the building is considered. The adjacent time interval is taken as weight,the 1-WAGO sequence is directly made and the unequal interval GM(1,1) model is established. Secondly,the model is applied in insertion work in the interrupted data. When the error of the simulated values is big,one rank model of the residual error is applied to modify the original model. Finally,the result of model test shows that the precision of the modified model is improved and the better interrupted data are obtained.
【Fund】: 河南省重点科技攻关项目(0302032700)
【CateGory Index】: TU196.2
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